CN103923490A - Preparation method of wet-process controllable spherical superfine calcium carbonate - Google Patents
Preparation method of wet-process controllable spherical superfine calcium carbonate Download PDFInfo
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- CN103923490A CN103923490A CN201410113485.5A CN201410113485A CN103923490A CN 103923490 A CN103923490 A CN 103923490A CN 201410113485 A CN201410113485 A CN 201410113485A CN 103923490 A CN103923490 A CN 103923490A
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Abstract
The invention relates to a preparation method of wet-process controllable spherical superfine calcium carbonate. The method comprises the following steps: adding zirconium oxide microbeads, which are taken as grinding medium, for grinding, and controlling the temperature of a paste to be at 70DEG C-80DEG C and the grinding time to be 90 minutes during the grinding process, thus producing more than 90% of spherical superfine calcium carbonate with the particle size of 2mum and the fineness of 6000meshes. The controllable spherical superfine calcium carbonate prepared by adopting the method has excellent dispersity, mobility and smoothness, can replace spherical light-weight calcium carbonate on the market, so that the production cost of plastic, coating and other products can be greatly lowered. Secondly, the particle size of the calcium carbonate is more than one time less than that of the calcium carbonate produced by adopting the traditional technology, so that the ground calcium carbonate can be applied in products having higher requirement on the fineness of the calcium carbonate. The prepared controllable spherical superfine calcium carbonate is applicable to industries of papermaking, plastic, rubber, coating, adhesives and the like.
Description
technical field
The present invention relates to the preparation method of the controlled spherical super fine calcium carbonate of a kind of wet method, belong to fine chemical technology field.
Background technology
Divided calcium carbonate is light calcium carbonate and water-ground limestone.It is a kind of important mechanicals filler.Water-ground limestone is mainly used in the industries such as rubber, plastics, papermaking, coating, and its usage quantity has surpassed the light calcium carbonate of being produced by chemical method.
The production method of superfine heavy calcium carbonate mainly contains two kinds of dry method and wet methods, and dry production superfine heavy calcium carbonate is feasible technically, but energy consumption is high, cost is high, infeasible economically; All mainly to adopt wet grinding to produce superfine heavy calcium carbonate.
But the water-ground limestone particle that traditional technology is produced is all random pattern, so just limited calcium carbonate and at some, shape and appearance of calcium carbonate had the application in the Industrial products of requirement.
Summary of the invention
The object of the invention is, for traditional technology, producing water-ground limestone particle is the defect of random pattern, and the present invention releases the preparation method of the controlled spherical super fine calcium carbonate of a kind of wet method.
Realizing technical scheme of the present invention is, the present invention is in vertical mixing grinds, and adding zirconium white microballon is that grinding medium grinds, and in process of lapping, controlling slurry temperature is 70 ℃-80 ℃, and it is 90 minutes that milling time is controlled; Thereby produce calcium carbonate particle diameter 2 μ m more than 90%, fineness is the spherical super fine calcium carbonate of 6000 object.
The concrete steps of the inventive method are as follows:
(1) crushing raw ore.Calcite raw ore is dropped into jaw crusher and carry out crushing raw ore.
(2) primary fragmentation.The fritter calcite of jaw crusher fragmentation is dropped into crusher and carry out primary fragmentation, the calcite particle diameter 3-5cm after once pulverizing.
(3) secondary breaking.Calcite after primary fragmentation is dropped into crusher and carry out secondary breaking, the calcite particle diameter after secondary breaking is 1-3cm.
(4) calcite particle after secondary breaking is dropped into stirred pot, then add Sodium hexametaphosphate 99 to be configured to 1% the aqueous solution toward stirred pot, stirred pot temperature is 60 ℃-100 ℃, then stirs, and makes slurry.
(5) vertical grinding.Calcite slurry in stirred pot is taken out, drop into vertical lapping machine and grind, the grinding medium of vertical lapping machine is zirconium white microballon; Zirconium white microballon particle diameter is 1-1.5mm.
(6) cross screen sizing.By 325 order piano-wire screens for the slurry after vertical grinding, on vibratory screening apparatus, sieve, collect 400 object slurries, lower than the defective material of 400 object, again drop into shredder and continue to grind.
(7) wet grinding.400 object calcium carbonate are dropped into shredder and carry out wet grinding, obtain the spherical super fine calcium carbonate of 6000 object.
(8) dry.6000 object slurries are adopted to quick expansion drying, and dry source is hot air.Dried product is controlled spherical super fine calcium carbonate.
The application of the controlled spherical super fine calcium carbonate of wet method in papermaking, can improve scattering of light and the thermal insulation of paper, and customer response is equally matched with this calcium carbonate and the paper performance that goes out by Production of Light Calcium Carbonate, but can significantly reduce production costs.
The application of the controlled spherical super fine calcium carbonate of wet method in tackiness agent, the calcium carbonate particle diameter of producing due to traditional technology is little, and the specific surface area of making calcium carbonate powder is little, and water-ground limestone is applied less than light calcium carbonate in tackiness agent.And the particle diameter of controlled spherical calcium carbonate is very little, specific surface area is several times of traditional water-ground limestone, has solved and in seal gum, has applied weak point.Customer response, is to reduce a lot of costs with this calcium carbonate than with light calcium carbonate, and product performance might as well.
The application of the controlled spherical super fine calcium carbonate of wet method in water-borne coatings, because spherical fine calcium carbonate has that surface-area is large, the property such as good dispersity, density is little, solvability good, good smoothness and mobility, be conducive to promote the hiding rare of coating.Customer response can partly substitute the titanium dioxide in water-borne coatings with this calcium carbonate, thereby can reduce costs.
The application of the controlled spherical super fine calcium carbonate of wet method in plastics, rubber.In plastics, rubber, because the controlled spherical super fine calcium carbonate of wet method good loose property, mobility, smoothness are significantly increased the consumption of calcium carbonate in plastics, rubber, its to plastics, reinforcing rubber effect at all not second to the water-ground limestone of traditional technology.
The invention has the beneficial effects as follows, the controlled spherical super fine calcium carbonate of being prepared by the inventive method, there is good dispersiveness, mobility, smoothness, the spherical light calcium carbonate that it is on the market alternative, thus significantly reduce the production cost of the products such as plastics, coating.Secondly it is more than one times that this calcium carbonate is produced than traditional technology on particle diameter calcium carbonate particle diameter is little, and this makes again water-ground limestone be applied in to the higher product of calcium carbonate fineness requirement at some.
Product prepared by the present invention is applicable to the industries such as papermaking, plastics, rubber, coating and tackiness agent.
Accompanying drawing explanation
fig. 1 is preparation technology's flow process of the controlled spherical super fine calcium carbonate of a kind of wet method of the present invention.
Embodiment
The specific embodiment of the invention as shown in Figure 1.
The concrete steps of the present embodiment are as follows:
(1) crushing raw ore.Calcite raw ore is dropped into jaw crusher and carry out crushing raw ore, obtain the fritter calcite of particle diameter 5-10 cm.
(2) primary fragmentation.The fritter calcite of jaw crusher fragmentation is dropped into crusher and carry out primary fragmentation, the calcite particle diameter 3-5cm after once pulverizing.
(3) secondary breaking.Calcite after primary fragmentation is dropped into crusher and carry out secondary breaking, the calcite particle diameter after secondary breaking is 1-3cm.
(4) calcite particle after secondary breaking is dropped into stirred pot, then add toward stirred pot the aqueous solution that is configured to 1% by Sodium hexametaphosphate 99, stirred pot temperature is 80 ℃, then stirs, and makes slurry.
(5) vertical grinding.Calcite slurry in stirred pot is taken out, drop into vertical lapping machine and grind, the grinding medium of vertical lapping machine is zirconium white microballon; Zirconium white microballon particle diameter is 1-1.5mm.
(6) cross screen sizing.By 325 order piano-wire screens for the slurry after vertical grinding, on vibratory screening apparatus, sieve, collect 400 object slurries, lower than the defective material of 400 object, again drop into shredder and continue to grind.
(7) wet grinding.400 object calcium carbonate are dropped into shredder and carry out wet grinding, obtain the spherical super fine calcium carbonate of 6000 object.
(8) dry.6000 object slurries are adopted to quick expansion drying, and dry source is hot air.Dried product is controlled spherical super fine calcium carbonate.
Claims (2)
1. the preparation method of the controlled spherical super fine calcium carbonate of wet method, it is characterized in that, described method is in vertical mixing grinds, and adding zirconium white microballon is that grinding medium grinds, in process of lapping, controlling slurry temperature is 70 ℃-80 ℃, and it is 90 minutes that milling time is controlled; Thereby produce calcium carbonate particle diameter 2 μ m more than 90%, fineness is the spherical super fine calcium carbonate of 6000 object.
2. a preparation method for the controlled spherical super fine calcium carbonate of wet method, is characterized in that, the particle diameter of described zirconium white microballon is 1-1.5mm.
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| CN201410113485.5A CN103923490A (en) | 2014-03-26 | 2014-03-26 | Preparation method of wet-process controllable spherical superfine calcium carbonate |
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| CN201410113485.5A CN103923490A (en) | 2014-03-26 | 2014-03-26 | Preparation method of wet-process controllable spherical superfine calcium carbonate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104403372A (en) * | 2014-12-08 | 2015-03-11 | 广西利升石业有限公司 | Dry-process preparation method of superfine heavy calcium carbonate |
| CN104403369A (en) * | 2014-11-26 | 2015-03-11 | 甘振辉 | Preparation method for acrylic copolymer ground calcium carbonate ultrafine powder |
| CN108752979A (en) * | 2018-05-10 | 2018-11-06 | 桂林永福恒达实业有限公司 | A kind of method that wet method prepares super fine calcium carbonate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526642A (en) * | 2003-03-05 | 2004-09-08 | 上海东升新材料有限公司 | Prepn of superfine light precipited calcium carbonate |
-
2014
- 2014-03-26 CN CN201410113485.5A patent/CN103923490A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526642A (en) * | 2003-03-05 | 2004-09-08 | 上海东升新材料有限公司 | Prepn of superfine light precipited calcium carbonate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104403369A (en) * | 2014-11-26 | 2015-03-11 | 甘振辉 | Preparation method for acrylic copolymer ground calcium carbonate ultrafine powder |
| CN104403372A (en) * | 2014-12-08 | 2015-03-11 | 广西利升石业有限公司 | Dry-process preparation method of superfine heavy calcium carbonate |
| CN108752979A (en) * | 2018-05-10 | 2018-11-06 | 桂林永福恒达实业有限公司 | A kind of method that wet method prepares super fine calcium carbonate |
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Application publication date: 20140716 |